Reagent dropwise adding device

Abstract

The utility model provides a reagent dropping device which comprises a reagent temporary storage container and a peristaltic pump, a scale identification part is arranged on the reagent temporary storage container, the peristaltic pump is provided with an inlet and an outlet, and the inlet of the peristaltic pump is communicated with the inside of the reagent temporary storage container. According to the utility model, when the chemical additive is dropwise added into the wire feeding groove, the chemical additive can be added into the reagent temporary storage container firstly, and the reagent temporary storage container is provided with the scale identification part, so that the amount matched with production is transferred according to the identification of the scale identification part, the dosage of the chemical additive is prevented from exceeding the standard in the dropwise adding process, and the dropwise adding amount is accurately controlled. Next, the dripping speed can be controlled through the peristaltic pump, the dripping speed is accurately stabilized at the speed required by current production, and when the production condition changes, the peristaltic pump can be controlled to be accurately switched to the corresponding dripping speed, so that the problems that the dripping speed cannot be accurately matched with the production condition, and the production efficiency is low are solved. And the concentration control of the chemical auxiliary agent in the wire feeding groove is not uniform.

Description

Technical Field

[0001] This utility model belongs to the field of chemical reagent technology for fiber production, and specifically relates to a reagent dripping device. Background Technology

[0002] In the wet spinning process of polyacrylonitrile (PAN) precursor yarn, the coagulation and formation of nascent fibers is the most basic and crucial step. The performance of the precursor yarn is largely determined by the formation process of the nascent fibers, and the addition of chemical auxiliaries during this process can significantly improve its performance. The existing method involves adding one or several barrels of chemical auxiliaries (2.5L / barrel) to a small glass storage tank, and then dripping the auxiliaries into the yarn feeder through a micro-turn valve. This method has two major drawbacks: first, the amount of chemical auxiliaries added to the glass storage tank is roughly estimated manually, leading to inaccurate control of the dripping amount; second, the opening of the micro-turn valve is also manually controlled, making it impossible to accurately match the dripping speed with production conditions, resulting in uneven concentration control of the chemical auxiliaries in the yarn feeder. Utility Model Content

[0003] Therefore, this invention provides a reagent dripping device that can solve the problems of inaccurate control of the dripping amount and uneven concentration control in the existing chemical auxiliaries dripping method during the wet spinning process of polyacrylonitrile precursor fibers.

[0004] To address the aforementioned problems, this utility model provides a reagent dispensing device, comprising: a reagent storage container and a peristaltic pump. The reagent storage container is provided with a graduation mark, and the peristaltic pump has an inlet and an outlet, the inlet being connected to the interior of the reagent storage container.

[0005] In some embodiments, a liquid level sensor is provided inside the reagent storage container.

[0006] In some embodiments, the reagent adding device further includes a reagent adding container, the volume of which is larger than the volume of the reagent storage container, and the reagent adding container is used to add reagents into the reagent storage container.

[0007] In some embodiments, the reagent adding container and the reagent temporary storage container are connected by a first pipeline, and a first control valve is provided on the first pipeline.

[0008] In some embodiments, the reagent adding container is provided with a power assembly for providing power to transport the reagent in the reagent adding container to the reagent storage container.

[0009] In some embodiments, the power assembly includes a piston mounted within the reagent addition container.

[0010] In some embodiments, the piston has at least two sealing portions, each of which is spaced apart along the axial direction of the piston, and the outer peripheral sidewall of each sealing portion abuts against the inner wall of the reagent addition container.

[0011] In some embodiments, a plurality of supports are connected between two adjacent sealing portions, and each support is spaced apart circumferentially along the piston.

[0012] In some embodiments, each support between two adjacent sealing portions is a support group, and when the number of sealing portions is greater than or equal to three, the supports of the support groups in adjacent layers are staggered.

[0013] In some embodiments, the power assembly further includes an operating component connected to the end face of the piston facing away from the bottom of the reagent adding container; and / or, the reagent adding container has a reagent adding port, and a second control valve is provided in the flow path of the reagent adding port.

[0014] This invention provides a reagent dripping device. When adding chemical auxiliaries to the yarn feeding trough, the chemical auxiliaries can first be added to a reagent storage container. Since the reagent storage container is equipped with a graduation mark, the amount added is matched to the production volume according to the graduation mark, thus achieving quantitative addition of chemical auxiliaries. This avoids exceeding the dosage of chemical auxiliaries during the dripping process, precisely controlling the dripping amount and solving the problem of inaccurate control of the chemical auxiliaries' dripping amount. Next, the dripping speed can be controlled by a peristaltic pump to accurately stabilize the dripping speed at the current production speed. When production conditions change, the peristaltic pump can be controlled to accurately switch to the corresponding dripping speed. This further solves the problem of uneven chemical auxiliaries concentration in the yarn feeding trough caused by manually controlling the opening of the stopcock valve, ensuring the stability of the chemical auxiliaries concentration during production and further improving the production quality of the raw yarn. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the reagent adding device according to an embodiment of the present invention;

[0016] Figure 2 This is a schematic diagram of the piston of the reagent adding device according to an embodiment of the present invention.

[0017] The reference numerals in the attached figures are as follows:

[0018] 1. Reagent inlet; 2. Second control valve; 3. Reagent inlet container; 4. Operating component; 5. Piston; 51. Sealing part; 52. Support body; 6. First pipeline; 7. Reagent storage container; 8. Liquid level sensor; 9. Peristaltic pump. Detailed Implementation

[0019] See also Figure 1 and Figure 2 As shown in the figure, according to an embodiment of the present invention, a reagent dripping device is provided, including: a reagent storage container 7 and a peristaltic pump 9. The reagent storage container 7 is provided with a scale marking section, and the peristaltic pump 9 has an inlet and an outlet. The inlet of the peristaltic pump 9 is connected to the interior of the reagent storage container 7. In this technical solution, when adding chemical additives to the wire feeding trough, the chemical additives can be added to the reagent storage container 7 first. Since the reagent storage container 7 is provided with a scale marking section, the amount matching the production is entered according to the markings on the scale marking section, that is, quantitative addition of chemical additives is achieved, avoiding excessive use of chemical additives during the dripping process, accurately controlling the dripping amount, thereby solving the problem of inaccurate control of the dripping amount of chemical additives. Next, the dripping speed can be controlled by the peristaltic pump 9 to accurately and stably maintain the speed required for current production. When production conditions change, the peristaltic pump 9 can be controlled to accurately switch to the corresponding dripping speed. This solves the problem of uneven chemical additive concentration control in the yarn feeding trough caused by the manual control of the stopcock valve opening, which prevents the dripping speed from accurately matching the production conditions. This ensures the stability of the chemical additive concentration during production and further improves the quality of the raw yarn. The peristaltic pump 9 can provide a dripping flow rate of 0-30 L / min. The chemical additives can be inorganic solvents such as water, acids, or alkalis; or organic solvents such as N,N-dimethylamide, dimethyl sulfoxide, and ethylene glycol.

[0020] See Figure 1 As shown, a liquid level sensor 8 is installed inside the reagent storage container 7. The liquid level sensor 8 is connected to the control device of the peristaltic pump 9, which is semi-automatic. Under the continuous operation of the peristaltic pump 9, when the liquid level of the chemical additive in the reagent storage container 7 drops to the set value, that is, when the chemical additive in the reagent storage container 7 is basically finished, the liquid level sensor 8 will send a signal to the control device to stop the peristaltic pump 9 from working, thus preventing the peristaltic pump 9 from running dry in a liquid-free state.

[0021] In this embodiment, considering the stability of the dripping process, the volume of the reagent storage container 7 is designed to be relatively small. If the barrelled chemical additives are directly added into the reagent storage container 7, repeated operations are required. Moreover, chemical additives are volatile, and frequent additions could pose safety hazards. Therefore, the reagent dripping device of this application also includes a reagent addition container 3. The volume of the reagent addition container 3 is much larger than that of the reagent storage container 7, allowing multiple barrels of chemical additives to be added into the reagent addition container 3 at once. The chemical additives are then added from the reagent addition container 3 into the reagent storage container 7. By using a dripping method that combines the reagent addition container 3 and the reagent storage container 7, the additives in the reagent addition container 3 are quantitatively transferred to the reagent storage container 7, thus avoiding repeated contact with the additives and ensuring the stability of the dripping amount.

[0022] See also Figure 1 As shown, the reagent adding container 3 and the reagent temporary storage container 7 are connected by a first pipe 6. One end of the first pipe 6 is at the bottom of the reagent adding container 3, and the other end is at the top of the reagent temporary storage container 7. The highest point of the first pipe 6 is higher than the liquid level of the reagent in the reagent adding container 3. This allows for an immediate stop in adding reagent when the reagent adding container 3 stops transferring reagent into the reagent temporary storage container 7, functioning similarly to a valve.

[0023] In this embodiment, because chemical additives are volatile, they can easily enter the reagent storage container 7 through the first pipeline 6. If the reagent storage container 7 contains additives before the additives are added in a measured amount, it will affect the accuracy of the additive addition. Therefore, a first control valve is also provided in the flow path of the first pipeline 6. When it is necessary to add a measured amount of reagent to the reagent storage container 7, the first control valve is opened; after the quantitative addition of additives is completed in the reagent storage container 7, the first control valve is closed, which can prevent chemical additives from entering the reagent storage container 7 through evaporation.

[0024] In one specific implementation, a power component is provided inside the reagent adding container 3. The power component is used to provide power so that the reagent in the reagent adding container 3 is transported to the reagent temporary storage container 7 through the first pipeline 6.

[0025] Specifically, the power assembly includes a piston 5, which is installed inside the reagent adding container 3. The piston 5 is made of a corrosion-resistant material, such as rubber, to withstand the corrosion of the chemical additives. By pushing the piston 5, the chemical additives in the reagent adding container 3 are transported to the reagent storage container 7 through the first pipeline 6 under pressure. Alternatively, a micro pump, peristaltic pump, stepper motor, cylinder, or other devices can be used to provide power to transport the additives to the reagent storage container 7. Of course, the reagent adding container 3 can also be positioned above the reagent storage container 7. When the first control valve is opened, the chemical additives will automatically enter the reagent storage container 7 along the first pipeline 6 under the influence of gravity.

[0026] Referring to Figure 2, the piston 5 has at least two sealing parts 51, which are spaced apart along the axial direction of the piston 5. The outer peripheral sidewall of each sealing part 51 abuts against the inner wall of the reagent adding container 3, meaning that each sealing part 51 serves to seal the reagent adding container 3. This improves the sealing performance of the piston 5. For example, if one sealing part 51 leaks and fails to seal, the other sealing parts 51 will still provide a seal, thus preventing liquid backflow during liquid transfer.

[0027] Referring to Figure 2, multiple supports 52 are connected between two adjacent sealing parts 51, and each support 52 is spaced apart along the circumference of the piston 5. Specifically, the formation of the sealing part 51 is equivalent to constructing an annular groove on the piston 5, with the upper and lower parts of the annular groove forming the sealing part 51. This makes the sealing part 51 suspended, and during the sliding of the piston 5 along the reagent adding container 3, the suspended sealing part 51 is relatively easy to deform under stress, which can easily cause leakage. However, the multiple supports 52 connected between two adjacent sealing parts 51 can provide multi-point support for the sealing part 51, enhancing the structural strength of the sealing part 51, making it less prone to deformation under stress, and improving the stability of the seal. It should be noted that the thickness of the sealing part 51 is 6-10 mm, and the distance between two adjacent sealing parts 51 is 5-10 mm.

[0028] In one specific implementation, the supports 52 between two adjacent sealing parts 51 form a support group. When the number of sealing parts 51 is greater than or equal to three, the supports 52 of the support groups in adjacent layers are staggered, such as... Figure 2 As shown, the staggered distribution results in more connection points on the sealing part 51, providing better support.

[0029] More specifically, the power assembly also includes an operating component 4, which is connected to the end face of the piston 5 facing away from the bottom of the reagent adding container 3. The operating component 4 facilitates the pushing of the piston 5. The reagent adding container 3 has a reagent adding port 1, the feeding end of which is funnel-shaped, and a second control valve 2 is provided in the flow path of the reagent adding port 1. By opening the second control valve 2, chemical additives can be added into the reagent adding container 3. After the additives have been added, the second control valve 2 is closed to prevent the chemical additives from evaporating.

[0030] The process of using the dripping device of this application is as follows: First, open the second control valve 2 and add sufficient chemical additives into the reagent adding container 3 through the reagent adding port 1, and then close the second control valve 2; Second, push the operating component 4 to move the piston 5 down in the reagent adding container 3, thereby pressing the additives in the reagent adding container 3 into the reagent storage container 7, and transfer the amount matched to production according to the markings on the scale markings; Finally, after setting the parameters of the peristaltic pump 9, start it. When the liquid level in the reagent storage container 7 drops to the set value, the peristaltic pump 9 automatically stops working, and the dripping ends.

[0031] It will be readily understood by those skilled in the art that the aforementioned advantageous methods can be freely combined and superimposed without conflict.

[0032] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model. The above are only preferred embodiments of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A reagent dispensing device, characterized in that, It includes a reagent storage container (7) and a peristaltic pump (9). The reagent storage container (7) is provided with a scale marking section, and the peristaltic pump (9) has an inlet and an outlet. The inlet is connected to the interior of the reagent storage container (7).

2. The reagent adding device according to claim 1, characterized in that, A liquid level sensor (8) is installed inside the reagent storage container (7).

3. The reagent adding device according to claim 1, characterized in that, It also includes a reagent adding container (3), the volume of which is greater than the volume of the reagent storage container (7), and the reagent adding container (3) is used to add reagents into the reagent storage container (7).

4. The reagent adding device according to claim 3, characterized in that, The reagent adding container (3) and the reagent temporary storage container (7) are connected by a first pipeline (6), and a first control valve is provided on the first pipeline (6).

5. The reagent adding device according to claim 3, characterized in that, The reagent adding container (3) is provided with a power component, which is used to provide power so that the reagent in the reagent adding container (3) is transported to the reagent storage container (7).

6. The reagent adding device according to claim 5, characterized in that, The power assembly includes a piston (5) which is installed inside the reagent addition container (3).

7. The reagent adding device according to claim 6, characterized in that, The piston (5) has at least two sealing parts (51), each sealing part (51) is spaced apart along the axial direction of the piston (5), and the outer peripheral sidewall of each sealing part (51) abuts against the inner wall of the reagent addition container (3).

8. The reagent adding device according to claim 7, characterized in that, Multiple supports (52) are connected between two adjacent sealing parts (51), and each support (52) is arranged at intervals along the circumference of the piston (5).

9. The reagent adding device according to claim 8, characterized in that, Each of the supports (52) between two adjacent sealing parts (51) forms a support group. When the number of sealing parts (51) is greater than or equal to three, the supports (52) of the support groups of adjacent layers are staggered.

10. The reagent dispensing apparatus according to any one of claims 6 to 9, characterized in that, The power assembly also includes an operating component (4) connected to the end face of the piston (5) away from the bottom of the reagent adding container (3); and / or, the reagent adding container (3) has a reagent adding port (1) and a second control valve (2) is provided on the flow path of the reagent adding port (1).

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